Coulomb's Law - Net Electric Force & Point Charges

This physics video tutorial explains the concept behind coulomb's law and how to use it to calculate the electric force between two and three point charges. This video contains plenty of examples and practice problems for students taking high school or college level physics.
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[@TheOrganicChemistryTutor]

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[@MohamedWael-o1k]

00:02 Coulomb's Law calculates the electric force between point charges. 02:41 Coulomb's law explains the relationship between electric forces and point charges. 07:41 The video discusses Coulomb's Law, units of electric charge and distance, and provides a practice problem 10:06 The net electric force between two point charges can be calculated using Coulomb's Law. 14:53 The distance between the two point charges is 2.078 centimeters. 17:14 Calculate the magnitude of the two identical point charges. 21:48 The electric charge of one electron is negative 1.6 times 10 to the negative 19 coulombs. 23:59 The net electric charge on the metal sphere is -400 coulombs. 28:25 The net force acting on charge two is the sum of the forces exerted by charge one and charge three. 30:45 The net electric force acting on the 200 micro coulomb charge is 1994 Newtons. 35:36 The net force acting on charge one is -8.75 N.

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At 3:20, you have written K = 9 * 10^9 N/m^2c^2. Its actually meant to be K = 9 * 10^9 N m^2/c^2

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3:07 the constant K=9*10^9 unit nm^2 c^-2. THE UNIT IS NOT n/m^2 c^2

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At 35:49, when we are calculating the net force of the charge, aren't we calculating the magnitude of the net force of the charge not the vector itself? Why did you make 11.25 negative and 2.5 positive if the problem asks us to find the magnitude of the net force? In this case 11.25 would be positive since it asks us to find the magnitude of the force (magnitude is always positive, doesn't deal with direction) right? If the problem asked for the vector form wouldn't we have to express it in either component form or unit vector form (xi + yj)?

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